How much does it cost to sandblast and resurface a concrete Ottawa pool that is 30 years old?

Sandblasting and resurfacing a 30-year-old concrete pool in Ottawa typically costs $12,000 to $20,000 for a standard residential pool, with the wide range depending on pool size, surface condition, and finish material chosen. This is a significant investment, but for a three-decade-old concrete pool, resurfacing is likely overdue and essential for both appearance and structural integrity.

Ottawa's harsh freeze-thaw cycles are particularly brutal on concrete pool surfaces. After 30 years of exposure to temperatures ranging from -30°C winters to +35°C summers, plus 50+ annual freeze-thaw cycles, your pool's original plaster or aggregate finish is almost certainly showing signs of deterioration. Common issues include surface spalling (flaking concrete), exposed aggregate, rough texture that's hard on swimmers' feet, staining that won't respond to acid washing, and potentially small cracks that allow water to penetrate behind the surface. These problems only worsen with each passing Ottawa winter if left unaddressed.

The resurfacing process begins with sandblasting or other mechanical surface preparation to remove the old finish down to sound concrete. This costs $3 to $6 per square foot depending on how stubborn the old surface proves to be. The pool is then inspected for any structural cracks that need repair before applying the new finish. Standard white plaster finish runs $4 to $6 per square foot, while upgraded options like colored plaster, quartz aggregate, or pebble finishes range from $6 to $12 per square foot. For a typical 14x28 foot pool with shallow and deep ends, you're looking at roughly 800 to 1,000 square feet of surface area.

Important timing consideration for Ottawa: This work must be completed and cured before fall temperatures drop consistently below 10°C, as concrete curing is temperature-sensitive. Most Ottawa pool resurfacing happens between May and August to ensure proper curing before winter. The pool will be out of service for 2 to 4 weeks during the process, including cure time before refilling.

A 30-year-old pool may also need additional work beyond just surface refinishing. The tile line often requires replacement ($15 to $30 per linear foot), coping stones may need resetting or replacement ($25 to $60 per linear foot), and the pool's plumbing and equipment are likely due for updates as well. Factor these potential additional costs into your planning.

When you're ready to get specific quotes for your pool's resurfacing project, you can browse experienced concrete pool contractors through the Ottawa Construction Network directory at justynrookcontracting.com/directory to compare local professionals who understand Ottawa's climate challenges and concrete pool restoration requirements.